Change the default options for the official ASan build:

Change the default options for the official ASan build:
 - remove quarantine_size, which is too greedy compared to the default value
 (this may result in less UAFs caught by ASan, but is very unlikely. ClusterFuzz uses the default setting)
 - temporarily set malloc_content_size=5 to avoid the enourmous growth of the stack trace repository
 (this will result in less memory footprint and shorter stacks for heap allocations printed in the reports.
 However we don't care much about the quality of ASan reports on the client side right now).

BUG=address-sanitizer:177
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=194555

[Alexander Potapenko, 2013-04-12 15:34:46]

Carlos, can you please take a look?

[cpu_(ooo_6.6-7.5), 2013-04-16 21:33:13]

lgtm

[Alexander Potapenko, 2013-04-17 09:29:21]

Committed patchset #1 manually as r194555 (presubmit successful).